unix_domain_socket_acceptor.cc revision 1320f92c476a1ad9d19dba2a48c72b75566198e9
15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright 2014 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "chrome/browser/apps/app_shim/unix_domain_socket_acceptor.h" 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/files/file_util.h" 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/files/scoped_file.h" 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/logging.h" 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "ipc/unix_domain_socket_util.h" 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace apps { 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)UnixDomainSocketAcceptor::UnixDomainSocketAcceptor(const base::FilePath& path, 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Delegate* delegate) 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) : path_(path), delegate_(delegate), listen_fd_(-1) { 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(delegate_); 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CreateSocket(); 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)UnixDomainSocketAcceptor::~UnixDomainSocketAcceptor() { 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Close(); 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool UnixDomainSocketAcceptor::CreateSocket() { 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(listen_fd_ < 0); 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Create the socket. 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return IPC::CreateServerUnixDomainSocket(path_, &listen_fd_); 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool UnixDomainSocketAcceptor::Listen() { 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (listen_fd_ < 0) 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Watch the fd for connections, and turn any connections into 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // active sockets. 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::MessageLoopForIO::current()->WatchFileDescriptor( 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) listen_fd_, 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) true, 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::MessageLoopForIO::WATCH_READ, 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) &server_listen_connection_watcher_, 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) this); 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Called by libevent when we can read from the fd without blocking. 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void UnixDomainSocketAcceptor::OnFileCanReadWithoutBlocking(int fd) { 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(fd == listen_fd_); 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int new_fd = -1; 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!IPC::ServerAcceptConnection(listen_fd_, &new_fd)) { 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Close(); 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) delegate_->OnListenError(); 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::ScopedFD scoped_fd(new_fd); 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!scoped_fd.is_valid()) { 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // The accept() failed, but not in such a way that the factory needs to be 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // shut down. 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Verify that the IPC channel peer is running as the same user. 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!IPC::IsPeerAuthorized(scoped_fd.get())) 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) IPC::ChannelHandle handle(std::string(), 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::FileDescriptor(scoped_fd.release(), true)); 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) delegate_->OnClientConnected(handle); 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void UnixDomainSocketAcceptor::OnFileCanWriteWithoutBlocking(int fd) { 745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) NOTREACHED() << "Listen fd should never be writable."; 755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void UnixDomainSocketAcceptor::Close() { 785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (listen_fd_ < 0) 795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (IGNORE_EINTR(close(listen_fd_)) < 0) 815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) PLOG(ERROR) << "close"; 825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) listen_fd_ = -1; 835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (unlink(path_.value().c_str()) < 0) 845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) PLOG(ERROR) << "unlink"; 855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Unregister libevent for the listening socket and close it. 875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) server_listen_connection_watcher_.StopWatchingFileDescriptor(); 885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace apps 915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)